Roll stabilizing device



,1 R.IEKSERGIAN ETAL 235.36

ROLL STABILYTZING DEVI-CE Filed April 21; 1939 2 Sheets-Sheet 1INVENTORS March 18,1941. R. EKSERGIAN EI'AL 53 ROLL STAB ILIZING DEVICEFiled April 21, 1939 2 Shets-Sheet 2 INVEN BY 9 Y glmmflwg ATTORNEYPatented Mar. 18, 1941 UNITED STATES PATENT OFFICE 2,235,362 ROLLSTABILIZING DEVICE Rupen Eksergian, Lansdowne, and Henry K. Harwick,Darby, Pa... assignors to Edward G. Budd Manufacturing Company,Philadelphia, Pa.,'a corporation of Pennsylvania Application April 21,1939, Serial No. 269,088

Claims. (Cl. 105-190) vice, to incorporate it in a truck structure so asto interfere least with clearances between parts mounted on the truckand said device, to provide such a device which interferes with aminimum with the usual transverse movement of the bolster and to providesuch a device which can be readily installed or removed from the truckfor replacement or repair.

In the preferred embodiment of the invention the device is associatedwith a transversely swinging bolster and is interposed between thebolster and the truck frame, more particularly between the springsupported bolster and a transom connecting the side frames of the truck.Morespecifo ically it consists of a transverse torsion member pivoted tothe transom and having arms rigidly secured adjacent its ends, thesearms being connected to the bolster in a manner to permit freetransverse movement of the bolster within the usual limits.

Other and further objects and advantages and the manner in which theyare attained will become clear from the following detailed descriptionwhen read in connection with the drawings forming a part'hereof.

In the drawings:

Fig. 1 shows in top plan view a railway truck to which the improved rollstabilizing device has been applied.

Fig. 2 is a transverse vertical sectional view through the truck showinga fragmentary part of the car body mounted thereon, the section beingtaken substantially on the line 22 of Fig.1 looking in the direction ofthe arrows at the 40 ends of the section line.

Fig. 3 is a fragmentary longitudinal vertical sectional view on anenlarged scale taken approximately on the .line 3-3 of Fig. 1 looking inthe direction of the arrows at the ends of the section line.

Figs. if-5 and 6 are detail secti 'nal views on enlarged scales showingthe details of the connection of the stabilizing device to the truckparts. The-truck frame to which the device is shown applied i of thetype having side frames 10 and spaced transoms ll interconnecting theside frames. The side frames are supported adjacent thelrends by wheeland axle assemblies H.

The bolster I3 is disposed between the transoms II and is supportedadjacent itsends by the springs M. In this instance, the bolster issuspended from the frame for transverse swinging movement through swinghangers i5 hinged at the top to the transoms and supporting at thebottom the spring plank l6 upon which the bol- 5 ster supporting springs[4 seat. The bolster is loosely mountedbetween the transoms, so as tohave slight movement in the longitudinal direction of the truck betweenthe transoms.

In this instance, the central portions of the 10 transoms and thebolster are depressed to provide a low swung support for the bodyindicated at H,

-and engaging the truck bolster at the center bearing 18 and the sidebearings I9 at the ends of the bolster.

With such a truck arrangement it will be seen that when the body isunder a strong tendency to tilt sideways, as when rounding a curve,there exists a tendency'tooverload one of the bolster springs and todecrease the loading on the other: 20 Aside from this effect on thesprings such transverse tilting of the body detracts from the comfort ofthe passengers.

The roll stabilizer of the invention tends to minimize this lateraltilting or roll and causes the bolster to compress the springs atopposite sides with about equal force.

The stabilizer consists according to the preferred form shown of atransverse bar 20 torsionally rigid and supported adjacent'its ends inbearing blocks 2| securedby bolts 22 to brackets 23 projecting laterallyfrom one of the transoms II. It projects beyond the bearing blocks andhas secured to its projecting ends the rigid arms 24 keyed to the bar toprevent rotation relative thereto. The key is indicated by 24 (Fig. 6).The arms may be held against'longitudinal movement on the bar by splitspring rings 25 located in grooves 25' on the ends of the arm.

The free ends of the arms 22 extend over the 40 bolster l3 and arepivotally connected thereto adjacent the transverse center line thereof.This pivotal connection 'is such as to permit freely the slightfore andaft movement of the bolster,

the lateral movement due to its swinging support,

and also any slight tilting of the bolster with respect to the axis ofthe bar 20 without bending and with a minimum of friction. In otherwords,

theconne'ction is one permitting universal movement between the arms andbolster, and most of the relative movement is through anti-frictionbearings.

Since both arms are connected to the bolster in the same manner, it willsuflice to describe one of these connections. The arm 24..is bifurcatedat its free end having the upper and lower forks 26 and 21. The innerfaces of these forks are formed with cylindrical bearing faces 28 and29f respectively, between which is received a bearing block 30 shorterthan the faces 28 and 29 and having corresponding cylindrical facesengaging the faces 28 and 29, so that the block is capable of rotatingaround an axis extending longitudinally of the arm and of sliding in thedirection of said axis. This blockin turn carries an antifrictionbearing 3|, which in this instance consists of three annular series ofballs and these engage and roll upon a. bolt 32 supported on thetransverse center line of the bolster by spaced brackets 33 and 34,which are, in this instance integral ribs projecting from the top faceof the bolster. The brackets 33 and 34 are spaced a sufficient distancefrom the arm 22 when the bolster is in its normal central position topermit free lateral movement of the bolster in either directio o thedesired extent. Cushions 35-are provided t the ends of the bolster tocushion the lateral movement of the bolster against the side frames l0.

The ends of the forks of the arms are secured together in properlyspaced relation by spacing block 36, a U-shaped clamping member 31 and abolt 38 passing through said block and member and the ends of the forks.a

It will be seen from the foregoing that the device is of very rugged andpractical construction, allowing freedom of movement to the bolster inits necessary movements, and at the same time constraining it againstany substantial tilting movement such as would result in undesirableroll and unequal loading of its supporting springs.

The self-aligning hearings on the arms engaging the bolts 32 throughanti-friction ball bearings having previously been assembled with the.

bolster. 'A unit can thus be readily removed and replaced for repair orotherwise. i

What we claim is: 1. In a railway truck, a rigid truck frame having sideframes 'and'spaced transoms rigidly interconnecting the side frames, abolster mounted for movement transversely of said frame, disposedbetween said transoms and spring supported ad jacent its ends fromsaidtruck frame, and means for preventing transverse tilting of the bolsterand unequal loading of the springs at its opposite ends, said meanscomprising a transverse torsion rod pivoted adjacent its opposite endson said rigid,

truck frame and arms rigidly secured adjacent the ends of said rod andhaving their free ends pivotally and slidably connected to the bolster,the slidable connection permitting freely the transverse movement of thebolster and the pivotal connection permitting limited universal movementbetween the arms and the bolster.

2. In a railway truck, a rigid truck frame hav-.

ing side frames and spaced transoms rigidly interconnecting the sideframes, a bolster mounted for movement transversely'of said frame,disposed between said transoms and spring supported adjacent its endsfrom said truck frame, and means 3. In a railway truck, a rigid truckframe having side frames and spaced transoms rigidly interconnecting theside frames, a bolster mounted for movement transversely of said frame,disposed between said transoms and spring supported adjacent its endsfrom said truck frame, and means for preventing transverse tilting ofthe bolster and unequal loading of the springs at its opposite ends,said means comprising a transverse torsion rod pivoted adjacent itsopposite ends on said rigid truck frame and arms rigidly securedadjacent the ends of said rod and having their free ends pivotally andslidably connected to the bolster, the slidable connection permittingfreely the transverse movement of the bolster, the bolster being alsomounted to permit slight movement in the longitudinal direction of thetruck between the transoms, the connection between the arms and bolsterincluding a second slidable connection freely permitting such movementof the bolster.

4. In a railway truck, a rigid truck framehaving side frames and spacedtransoms rigidly interconnecting the side frames, a bolster mounted formovement transversely of said frame, disposed between said transoms andspring supported adjacent its ends from said truck frame,

and means for preventing transverse tilting of the bolster and unequalloading of the springs at its opposite ends, said means comprising atransverse torsion rod pivoted adjacent its opposite ends on said rigidtruck frame and arms rigidly secured adjacent the'ends of said rod andhaving their free ends pivotally and slidably connected to the bolster,the slidable connection permitting freely the transverse movement of thebolster, the pivotal and-sliding connection comprising a bearing on eacharm rotatable and slidable on a .pin paralleling the torsion rod andsecured between spaced integral projections from a face of the bolster.

5. In a railway truck, a rigid truck frame having side frames and spacedtransoms rigidly interconnecting the side frames, a bolster mounted formovement transversely of said frame, disposed between said transoms andspring supported adjacentjits ends from saidtruck frame, and meansforpreventing transverse tilting of the bolster and unequal loading ofthe'springs at its opposite ends, said means comprising atransversetorsion rod pivoted adjacent its opposite"- ends on said rigid truckframe and arms rigidly secured adjacent the ends of said rod and havingtheir free ends pivotally and slidably connected to the bolster, theslidable connection permitting freely the transverse movement of thebolster, the connection of the torsion rod to the frame being throughbrackets integral with and extending laterally from a transom and thearms extend longitudinally of the truck and are secured centrally to thetop of the bolster.

I RUPEN EKSERGIAN. HENRY "K. HARWICK.

